SVdA on Prodigy Express 2

[Spittal Junction]

Hi I'm new to this, so please bear with me. I run an N gauge layout with 3 locomotives, A class 68 with sound pulls 4 carriages all with internal light bars. A class 37 goods train and a Class 156 2 car set. On occasions I experience all loco's stopping and the Gaugemaster Prodigy Express 2 controller displaying SAdA 0065. This clears the Class 68 loco runs but the other 2 remain stationary. I clean the track but dont have a wheel cleaner as yet, any suggestions as to the cause of this problem.

[Clagsniffer]

My express controller flashes svda when there’s a short circuit. 

[Spittal Junction]

Thanks for that, will check out the track for possible faults. I also put this post on the DCC section of the forum and have had advice from there as well

[MartynJPearson]

My Prodigy Advance 2 says SVDA on the screen when you disconnect the handset from the controller. Doing so actually saves the most recent locos into the recall list. Could you maybe have a loose connection somewhere?